KR20130135254A - Ballast water treatment system and ballast water treatment method - Google Patents

Abstract

A ballast water supply line 107 connecting the intake port 104 and the ballast tank 103, and disposed in the line 107, for electrically or mechanically killing aquatic organisms in the liquid withdrawn from the intake port 104. The chemical liquid supply device 101 which is connected to the killing apparatus 102 and the line 107 and supplies the sodium hypochlorite to the line 107 for killing the aquatic organisms in the liquid withdrawn from the intake port 104. And the chemical liquid supply device 101 is connected to a second intake port 114 different from the intake port 104 to which the ballast water supply line 107 is connected, and is withdrawn from the second intake port 114. Provided is a ballast water treatment system that electrolyzes liquid to generate sodium hypochlorite.

Description

Ballast water treatment system and ballast water treatment method {BALLAST WATER TREATMENT SYSTEM AND BALLAST WATER TREATMENT METHOD}

The present invention relates to a ballast water treatment system and a ballast water treatment method.

In ships such as tankers, large cargo ships, etc., when the ship is not loaded with oil or cargo, or when these ships are in a small state, the ballast water is generally stored in the ballast tank to secure the stability and balance of the ship. have. This ballast water is usually poured by pouring seawater or the like from the port where it is unloaded, and discharged from the port on which it is loaded. In this way, since the ballast water uses seawater or the like of the unloaded port, the ballast water includes aquatic organisms that reproduce around the unloaded port, and is discharged together with the ballast water in the port in which the aquatic life is loaded.

Recently, the disruption of ecosystems caused by the discharge of ballast water containing these aquatic organisms has become an international problem. For this reason, the International Maritime Organization (IMO) adopted the Ballast Water Management Treaty in 2004, and among them, the emission standards for living organisms in the ballast water discharged are strictly determined.

Various methods are proposed as a method of treating ballast water. Specifically, a method of removing aquatic organisms by filtration and centrifugation, a method of killing aquatic organisms physically and mechanically, a method of killing aquatic organisms by heat, injecting chemicals into a ballast tank, or generating chlorine-based substances The method of killing aquatic organisms (for example, patent document 1 and nonpatent literature 1), the method of combining these methods, etc. are mentioned.

On the other hand, even if the aquatic organisms in the ballast water are excluded, depending on the concentration of sodium hypochlorite remaining in the drainage, there is a concern that the environment around the port may be destroyed. For this reason, the method of neutralizing by adding a reducing agent according to the sodium hypochlorite concentration of ballast water at the time of discharge, the method of leaving ballast water to make the residual chlorine concentration of ballast water substantially zero, etc. (patent document 2) is proposed. It is.

Japanese Patent Publication No. 2007-515289 Japanese Patent No. 4426520

Yukihiko OKAMOTO et al. , JFE technique No. 25 (February 2010) p. 1-6

As described above, the ballast water management treaty has been adopted, and the installation of the ballast water treatment device is mandatory, so that a new technology capable of treating ballast water is required. Patent Literature 1 proposes a method of electrolyzing ballast water to generate sodium hypochlorite to kill aquatic organisms of ballast water. However, in order to kill aquatic organisms in ballast water only with sodium hypochlorite, a large amount of sodium hypochlorite is required, and a large tank for storing sodium hypochlorite is needed, or to generate a large amount of sodium hypochlorite. There is a problem that a large electrolysis apparatus and a large amount of power are required. In addition, the generation of sodium hypochlorite and the treatment of ballast water using the same are usually carried out during port berthing, and during the berth berth, a lot of electric power is required for loading and unloading the load or collecting water of the ballast water. There is a problem in that loading, unloading, unloading or disturbing the work of the water intake, or in the operation of the ship. Here, the present invention provides a new ballast water treatment system and a ballast water treatment method which can reduce the power consumption during port berthing and are compact and easy to mount on a ship.

The present invention is, in one aspect, a ballast water supply line for connecting the intake port and the ballast tank, disposed in the line, the killing apparatus for electrically or mechanically killing aquatic organisms in the liquid withdrawn from the intake port and And a chemical liquid supply device connected to the line for supplying an aqueous sodium hypochlorite solution to the line for killing aquatic organisms in the liquid withdrawn from the intake port, wherein the chemical liquid supply device supplies the ballast water. The ballast water treatment system which connects with the 2nd intake port different from the intake port which a line connects, electrolyzes the liquid withdrawal from the said 2nd intake port, and produces sodium hypochlorite.

In another aspect, the present invention is to electrically or mechanically kill the aquatic organisms in the liquid withdrawn from the intake port, to supply an aqueous sodium hypochlorite solution to the liquid withdrawn from the intake port, and the killing treatment and the Storing the liquid supplied with the aqueous solution of sodium hypochlorite in a ballast tank, and electrolytically decomposing the liquid for producing sodium hypochlorite containing at least a liquid withdrawn from a second intake port different from the intake port. It relates to a ballast water treatment method comprising producing an aqueous sodium hypochlorite solution.

Advantageous Effects of Invention According to the present invention, the power consumption during port berthing can be reduced, and it is compact and can be easily mounted on a ship.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows an example of the ballast water treatment system in Embodiment 1-1.
2A to C are schematic configuration diagrams showing an example of the configuration of the chemical liquid supply apparatus.
3A to D are schematic configuration diagrams showing an example of the configuration of the electrical processing apparatus.
4A is a flowchart showing an example of a method of processing ballast water during port berthing.
It is a flowchart which shows an example of sodium hypochlorite manufacture in a deballast method and navigation.
5 is a functional block diagram illustrating an exemplary configuration of a ballast water control system.
6 is a functional block diagram showing an example of the configuration of the measuring unit and the control unit included in the ballast water control system, and an example of data recorded in the recording unit.
FIG. 7 is a schematic configuration diagram showing another example of the ballast water treatment system according to the embodiment 1-1. FIG.
8 is a schematic block diagram showing another example of the ballast water treatment system according to the first embodiment.
9 is a schematic configuration diagram showing an example of a ballast water treatment system according to the embodiment 1-2.
10 is a schematic configuration diagram showing an example of a ballast water treatment system according to the embodiment 1-3.
It is a schematic block diagram which shows an example of the ballast water treatment system in Embodiment 1-4.
It is a schematic block diagram which shows the other example of the ballast water treatment system in Embodiment 1-4.
12A and B are partial views of the ballast water treatment system according to the embodiment 1-4.
It is a schematic block diagram which shows an example of the ballast water treatment system in Embodiment 1-5.
It is a schematic block diagram which shows an example of the ballast water treatment system in Embodiment 1-6.
FIG. 15 is a schematic block diagram showing an example of a ballast water treatment system according to the embodiment 2-1. FIG.
It is a schematic block diagram which shows an example of a structure of a chemical | medical solution supply apparatus.
17 is a functional block diagram illustrating a configuration example of a ballast water control system according to the second embodiment.
18 is a functional block diagram showing an example of the configuration of the measuring unit and the control unit and an example of data recorded in the recording unit.
19 is a flowchart showing an example of a ballast water treatment method in the ballast water treatment system according to the second embodiment.
20 is a graph showing an example of the attenuation curve of sodium hypochlorite.
21 shows an example of the configuration of the attenuation measurement unit of sodium hypochlorite.
It is a schematic block diagram which shows an example of the ballast water treatment system in Embodiment 2-3.
It is a schematic block diagram which shows an example of the ballast water treatment system in Embodiment 3-1.
24 is a schematic configuration diagram illustrating an example of a ballast water treatment system according to the fourth embodiment.

As used herein, the term "aquatic organisms" includes microorganisms that inhabit seas, rivers, lakes, and the like, and otherwise include yeasts, molds, vegetable or animal plankton, and plankton's eggs and spores, bacteria, fungi, viruses, seaweeds, windings. Aquatic organisms of a relatively small size, such as larvae of shellfish and shellfish, larvae of crustaceans such as crabs and the like. In addition, it may include microorganisms that can inhabit the estuaries, rivers, canals, and the like, which are connected to the sea, and the aquatic organisms described above.

In the present specification, "liquid withdrawn from the water intake port (including the case of simply" water withdrawn ") is taken out of the shipboard and stored in the ballast tank to be used as ballast water, and includes seawater, brackish water and fresh water. Can be. The liquid may be, for example, a liquid containing sodium chloride such as seawater or the like, or may be a liquid that does not contain. In addition, the area | region in which a liquid is taken out is not restrict | limited, A seawater area may be sufficient, A fresh water area, or a brackish water area may be sufficient as it. In this specification, "ballast water" means the liquid stored in a ballast tank, and can contain the liquid withdraw | collected from the intake port in order to store in a ballast tank. In addition, in this specification, the intake port connected to the ballast water supply line includes a sea chest.

In this specification, "ship" means the ship general provided with a ballast tank, and includes a container ship, a roll on roll off ship, a tanker, a bulk carrier, a chemical ship, and a car carrier. .

 [First aspect]

The present invention provides, as a first aspect, a ballast water supply line for connecting a water intake port and a ballast tank, and a killing apparatus for electrically or mechanically killing aquatic organisms in liquids disposed in the line and collected from the water intake port. And a chemical liquid supply device connected to the line and supplying an aqueous sodium hypochlorite solution to the line for killing aquatic organisms in the liquid withdrawn from the intake port, wherein the chemical liquid supply device includes the ballast water. A ballast water treatment system (hereinafter referred to as "first invention of the present invention) that connects to a second intake port different from the intake port to which the supply line is connected, and electrolytically decomposes the liquid withdrawn from the second intake port to generate sodium hypochlorite. Ballast water treatment system ".

In ships, operations such as taking in and out of ballast water, loading and unloading loads, etc. are used, and therefore a lot of electric power is used during port berthing. The present invention is based on the knowledge that the generation of sodium hypochlorite during navigation can reduce the amount of electric power used during port berthing.

According to the present invention of the first aspect, the ballast water is treated using two types of devices, an electrical or mechanical killing device and a chemical liquid supplying device for supplying sodium hypochlorite. It is possible to further reduce the size of the sodium hypochlorite generating device and to facilitate mounting on a ship. According to this invention of a 1st aspect, there exists an effect that power consumption in air port anchoring can be reduced by generating sodium hypochlorite during navigation.

In the first aspect, "electrical or mechanical killing of aquatic organisms (hereinafter also referred to as" killing apparatus ") means that at least a part of the aquatic organisms contained in the liquid withdrawn from the intake port is electrically or mechanically removed. Separating, removing, destroying and / or killing. Destruction of aquatic organisms involves the destruction of some or all of the aquatic organisms. As an electrical or mechanical killing apparatus, an electrolytic treatment apparatus, a centrifugal solid-liquid separator, and the apparatus which generate | occur | produces a shock wave by water pressure, etc. are mentioned, for example. As an electrolytic treatment apparatus, a well-known electrolytic treatment apparatus can be used. It is preferable that an electrolytic treatment apparatus is equipped with a fixed bottom type electrode electrolytic cell, for example. The fixed bottom electrode electrolyzer includes, for example, a fixed bottom for generating polarization and an electrode for feeding for generating polarization. The fixed bottom electrode electrolytic cell may be a monopolar type having one fixed bottom or a bipolar type having two or more fixed bottoms. As a voltage applied to an electrode, there are a DC voltage and an AC voltage, Preferably it is an AC voltage. The inter-electrode voltage is, for example, 10 V or less, 5 V or less, or 3 V or less, and since it can reduce power consumption and can suppress generation of unnecessary gas due to electrolysis, preferably 0.5 to 1.5. V. When the voltage applied to an electrode is an alternating voltage, it is more preferable that the voltage between electrodes is about 1.5V. When the voltage applied to an electrode is a DC voltage, it is more preferable that the voltage between electrodes is about 0.75V. The electrolytic treatment apparatus may be a cross flow method or a dead end method. It is preferable that it is a cross-flow system from the point which can prevent the clogging in an electrolytic treatment apparatus and can reduce a pressure loss. In the same point, the electrolytic treatment apparatus may be equipped with a backwash mechanism. As a centrifugal solid-liquid separation apparatus, a well-known centrifugal solid-liquid separation apparatus can be used, For example, a liquid cyclone etc. are mentioned.

In the first aspect, "killing aquatic organisms" means killing, sterilizing or killing at least a part of aquatic organisms contained in the liquid and / or ballast water to be treated and inhibiting the growth of aquatic organisms. Include. As the killing treatment of aquatic organisms, sodium hypochlorite is preferably added to the liquid withdrawn or the liquid which has undergone electrical or mechanical killing treatment so as to satisfy the ballast water discharge standard shown in Table 1 at the time of discharge of ballast water. It includes supplying an aqueous solution, and more preferably includes inhibiting killing, killing and / or proliferation of aquatic organisms so as to satisfy the ballast water discharge standard shown in Table 1 at the time of discharge of the ballast water.

[Table 1]

In the first aspect, the "chemical liquid supply apparatus" is an apparatus for supplying an aqueous sodium hypochlorite solution to a liquid withdrawn or a liquid subjected to electrical or mechanical killing. In a 1st aspect, "the 2nd intake water different from the intake port which a ballast water supply line connects" is other than an intake port (for example, a sea chest) for taking in the liquid for storing in a ballast tank, For example, the intake port for beverages etc. which exist in a ship are mentioned. The chemical liquid supply device is connected to a second intake port different from a water intake port (for example, a sea chest, etc.) to which the ballast water supply line is connected. For this reason, the chemical | medical solution supply apparatus can manufacture sodium hypochlorite aqueous solution by electrolyzing the liquid withdraw | collected from a 2nd water intake port, and generating sodium hypochlorite. Since the chemical liquid supply device is connected to the second intake port, water can be taken out without driving the ballast pump or the like, and the liquid intake and sodium hypochlorite can be easily generated even during the navigation. Withdrawal of liquid can be performed using an existing pump etc., for example. As an existing pump, the pump etc. which take in a drinking water, a sanitary liquid, etc. are mentioned, for example. In general, such a pump can be driven with less power consumption than a ballast pump, and by using this conventional pump, the liquid can be withdrawn with a small amount of power.

The chemical liquid supply apparatus may be an apparatus for generating sodium hypochlorite by electrolysis, and examples thereof include an electrolytic cell and a storage tank. By providing a storage tank, a high concentration of sodium hypochlorite is stored and supplied to a ballast water supply line through a pump or a valve as needed. The chemical liquid supply device may be provided with a temperature control means. By controlling the temperature of the sodium hypochlorite aqueous solution in the chemical liquid supply apparatus by the temperature adjusting means, the decomposition of hypochlorous acid in the aqueous sodium hypochlorite solution stored in the chemical liquid supply apparatus is suppressed, and the effective chlorine concentration is also increased. The chloric acid concentration can be reduced. As temperature of aqueous solution, it is 20 degrees C or less, Preferably it is 15 degrees C or less, More preferably, it is about 10 degreeC from the point which suppresses decomposition of hypochlorous acid. As temperature regulation means, cooling apparatuses, such as a chiller unit, a heating apparatus, etc. are mentioned, for example. The chemical liquid supply apparatus is a measuring instrument (hereinafter referred to as "sodium hypochlorite concentration meter" or simply "density meter") that can measure the concentration of sodium hypochlorite so as to grasp the sodium hypochlorite concentration supplied to the ballast water supply line, and It is preferable to provide a flowmeter, and it is preferable to control sodium hypochlorite concentration supplied to a ballast water supply line using these.

The chemical liquid supply device may include a sodium chloride storage tank. As a result, for example, even a ship sailing in a freshwater area can generate sodium hypochlorite. Even in a ship navigating in seawater, a higher concentration of sodium hypochlorite aqueous solution can be produced by adding sodium chloride to the seawater taken out. An aqueous solution may be sufficient as sodium chloride, and solid may be sufficient as it.

The chemical liquid supply device is connected to the ballast water supply line, and can supply an aqueous sodium hypochlorite solution to the liquid withdrawn from the intake port connected to the ballast water supply line. The connection position (supply point of the sodium hypochlorite aqueous solution) is not particularly limited, and examples thereof include an intake port connected to the ballast water supply line and a killing treatment device, and a killing treatment device and a ballast tank. .

In one embodiment, the chemical liquid supply device is connected to a water intake port (for example, a water intake for ballast water such as a sea chest) to which the ballast water supply line is connected in addition to or instead of the second intake port. do. By connecting to both the intake port for ballast water and the 2nd intake port, the liquid for manufacturing sodium hypochlorite aqueous solution can be efficiently taken in a chemical | medical solution supply apparatus. The line which connects the intake port for ballast water and a chemical | medical solution supply apparatus may be equipped with the intake pump different from a ballast pump. Thereby, the liquid for preparing aqueous sodium hypochlorite solution can be put in without driving a ballast pump. In addition, in one embodiment, the chemical liquid supply device may be connected to the ballast pump in addition to or instead of the second intake port.

In one embodiment, the first ballast water treatment system of the present invention may further include a post-treatment device for decomposing and treating sodium hypochlorite in the ballast water at the time of discharge of the ballast water. By providing a post-treatment apparatus, even when the sodium hypochlorite concentration of the ballast water exceeds the discharge standard at the time of discharge of the ballast water, the ballast water can be discharged quickly, and the amount of reducing agent used can be reduced. The post-treatment apparatus is not particularly limited as long as it can decompose or reduce hypochlorous acid. For example, a catalyst capable of decomposing hypochlorous acid can be used in view of reducing the amount of reducing agent used and reducing the operating capital required for ballast water treatment. The apparatus used is preferable. As a catalyst, nickel and palladium are mentioned, for example. The post-treatment apparatus may have an adsorbent such as alumina in addition to the catalyst. The post-treatment apparatus should just be arrange | positioned at the line through which ballast water passes at the time of discharge of ballast water. For example, it can arrange | position to a ballast water supply line, or it can arrange | position a branch line to a ballast water supply line, and arrange | position it to that line. The post-treatment device is preferably used in combination with a reducing agent supply device for reducing an aqueous sodium hypochlorite solution.

The 1st ballast water treatment system of this invention can be equipped with the acidic liquid storage tank (acidic liquid supply apparatus) for controlling the pH of the liquid supplied with the sodium hypochlorite aqueous solution to pKa or less of hypochlorous acid. Sodium hypochlorite has a pKa of about 7.5. For this reason, before supplying the aqueous sodium hypochlorite solution, by controlling the pH of the liquid to pKa or less, preferably in the range of pH 5 to 6, the killing ability by hypochlorous acid is improved, and the treatment efficiency of the killing ability of aquatic organisms is improved. You can. Further, even low sodium hypochlorite can be sufficiently killed to reduce the rot of pipes and ballast tanks. Examples of the acidic liquid stored in the acidic liquid storage tank include hydrochloric acid and sulfuric acid, and hydrochloric acid is preferable in view of high acidity. An acidic liquid storage tank may be connected to a ballast water supply line, for example, before supplying the sodium hypochlorite aqueous solution, it may be connected to a ballast water supply line so that an acidic liquid can be supplied to a withdrawn liquid.

This invention relates to the ship provided with the ballast water pouring method using the 1st ballast water treatment system of this invention, and the 1st ballast water treatment system of this invention as another aspect.

In another aspect, the present invention also provides an electrical or mechanical killing of aquatic organisms in the liquid withdrawn from the inlet, supplying an aqueous sodium hypochlorite solution to the liquid withdrawn from the inlet, and the killing treatment and the Electrolyzing the liquid for producing sodium hypochlorite, which comprises storing the liquid supplied with an aqueous sodium hypochlorite solution in a ballast tank, and further comprising at least a liquid withdrawn from a second intake port different from the intake port. It relates to a ballast water treatment method (hereinafter also referred to as "first ballast water treatment method of the present invention") comprising producing the aqueous sodium hypochlorite solution.

According to the first ballast water treatment method of the present invention, in order to perform the electrical or mechanical killing treatment and the treatment with sodium hypochlorite, for example, the treatment with sodium hypochlorite is difficult to kill enough shellfish and shellfish Larvae can be easily killed. According to the first ballast water treatment method of the present invention, the water intake from the outboard to the chemical liquid supply device becomes easy even during the navigation, and the production of the aqueous sodium hypochlorite solution during the navigation can be easily performed. The 1st ballast water treatment method of this invention can be performed using the 1st ballast water treatment system of this invention.

In the first ballast water treatment method of the present invention, the sodium hypochlorite aqueous solution may be supplied at any time before or after an electrical or mechanical kill treatment, or may be performed both before and after the treatment.

In the first ballast water treatment method of the present invention, in order to reduce the amount of power consumed in the vessel berthing, the production of an aqueous sodium hypochlorite solution and / or the withdrawal of a liquid therefor are preferably performed during navigation, and both of them are navigated. It is more preferable to carry out in the middle. It is preferable to store the sodium hypochlorite aqueous solution manufactured during navigation in the chemical | medical solution supply apparatus. As a result, the amount of power consumed during port berthing can be reduced, and the supply of the aqueous sodium hypochlorite solution can be started quickly. It is preferable to perform manufacture and storage of the sodium hypochlorite aqueous solution, controlling temperature. By controlling the temperature, decomposition of hypochlorous acid in the sodium hypochlorite aqueous solution stored in the chemical liquid supply device can be suppressed, and the effective chlorine concentration can be increased and the chloric acid concentration can be reduced.

In the 1st ballast water treatment method of this invention, the liquid for sodium hypochlorite manufacture may contain the liquid withdraw | collected from the said intake port which takes in the liquid stored in a ballast tank.

EMBODIMENT OF THE INVENTION Below, this invention is demonstrated in detail, showing preferred embodiment. However, this invention is not limited to embodiment shown below.

(Embodiment 1-1)

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 1-1 of this invention.

As shown in FIG. 1, the ballast water treatment system of this embodiment 1-1 includes the chemical | medical solution supply apparatus 101, the killing | treatment processing apparatus 102, and the ballast water supply line 107. As shown in FIG. According to the ballast water treatment system of the present embodiment 1-1, aquatic organisms are treated using the chemical liquid supply device 101 and the killing apparatus 102 that supply the aqueous sodium hypochlorite solution, so that the concentration of the aquatic organisms is lower than that of the conventional method. Sodium hypochlorite can kill aquatic organisms and prevent corrosion of piping and ballast tanks.

The ballast water supply line 107 is a line for supplying the liquid withdrawal from the water intake port 104 to the ballast tank 103, one end of the water intake (sea chest) 104, the strainer 105 to intake the ballast water And the ballast pump 106, and the other end is connected to the ballast tank 103. The ballast tank 103 is usually divided into a plurality of ballast tanks 103a to 103d.

The destruction treatment apparatus 102 is disposed in the ballast water supply line 107, and is disposed between the ballast pump 106 and the ballast tank 103. The chemical liquid supply device 101 is connected to the ballast water supply line 107 via the chemical liquid supply line 109, and can supply an aqueous sodium hypochlorite solution to the liquid treated by the killing processing device 102.

The chemical liquid supply device 101 is connected to the second intake port 114 different from the intake port (sea chest) 104 via the line 110. Thereby, the chemical | medical solution supply apparatus 101 can collect the liquid for generating sodium hypochlorite from the outboard, without driving the ballast pump 106. FIG. The water intake line 110 may be provided with the pump 116 and the strainer 115 for inject | pouring a liquid. As the second intake port 114 and the pump 116, a water intake port, a pump, and the like for a liquid or the like supplied to a vessel or a sanitary can be used. The chemical liquid supply line 109 may include a pump for feeding the aqueous sodium hypochlorite solution to the ballast water supply line 107 and a valve M for controlling the supply amount of the aqueous sodium hypochlorite solution. In addition, the liquid transfer of the sodium hypochlorite aqueous solution to the ballast water supply line 107 is performed by the pump (not shown) built in the chemical liquid supply apparatus 101 instead of the pump arrange | positioned at the chemical liquid supply line 109. You may also The chemical liquid supply line 109 may be further provided with, for example, a sodium hypochlorite concentration meter and a flow meter in order to measure the supply amount of sodium hypochlorite to the ballast water supply line 107. As a flowmeter, the integrated flowmeter FM which can measure a total flow volume and an instantaneous flow volume is preferable, for example.

As the chemical liquid supply device 101, for example, a chemical liquid supply device 201 in the form shown in FIG. 2A can be used. 2A is a schematic block diagram showing an example of the configuration of a device capable of generating sodium hypochlorite by electrolyzing a liquid. As shown to FIG. 2A, the chemical liquid supply apparatus 201 is equipped with the storage tank 211 for storing the sodium hypochlorite aqueous solution, and the electrolytic cell 212 for generating sodium hypochlorite by electrolytic treatment. The storage tank 211 is connected to the lines 110 and 109 and is capable of picking up a liquid for generating sodium hypochlorite from the outboard via the line 110, and the aqueous sodium hypochlorite solution stored through the line 109. Can be supplied to the ballast water supply line 107. The storage tank 211 and the electrolytic cell 212 are connected by the lines 213 and 214, and the sodium hypochlorite generated in the electrolytic cell 212 is stored in the storage tank 211 via the line 214. The storage tank 211 and the electrolytic cell 212 are preferably circulated by the lines 213 and 214 in terms of generating and storing sodium hypochlorite. The line 213 and or the line 214 may be provided with the pump for liquid feeding. Line 213 includes a heat exchanger 215 and a chiller unit 216 for controlling the temperature of the sodium hypochlorite aqueous solution.

It is preferable that the storage tank 211 is equipped with the heat insulating material in order to control the temperature of the sodium hypochlorite aqueous solution to store, or the liquid for manufacturing it.

It is preferable that the storage tank 211 is equipped with the sodium hypochlorite concentration meter. Accordingly, the concentration of sodium hypochlorite in the storage tank 211 can be managed, and the amount of sodium hypochlorite generated and the liquid supplied to the storage tank 211 according to the concentration of sodium hypochlorite in the storage tank 211. The amount of liquid, the amount of liquid conveyed to the electrolytic cell 212, etc. can be controlled.

Storage tank 211 and the electrolytic cell 212, is optionally provided with a blower 217 and an outlet 218 for discharging the gas (in particular, H ₂ gas) occurs.

The chemical liquid supply device 101 may be provided with a line (not shown) in which the liquid withdrawn from the ballast pump 106 can be inserted, in addition to the line 110 connected to the second intake port 116. . By connecting with the ballast pump 106, the liquid for manufacturing the sodium hypochlorite aqueous solution can be taken out efficiently.

As another example of the chemical liquid supply apparatus 101, the form shown to FIG. 2B and C is mentioned, for example. 2B and C are schematic structural diagrams showing other examples of an apparatus configuration capable of generating sodium hypochlorite by electrolysis. The chemical | medical solution supply apparatus 201 of the form shown in FIG. 2B is equipped with the electrolytic tank 212 connected with the line 110, and the storage tank 211 connected with the line 109, and the electrolytic cell 212 and the storage tank 211. ) Is connected by a line 213. The chemical liquid supply apparatus 201 of this embodiment puts the liquid for generating sodium hypochlorite from the outboard via the line 110 in the electrolytic cell 211, and produces | generates sodium hypochlorite here. The generated sodium hypochlorite aqueous solution is supplied to and stored in the storage tank 211 through the line 213, and is supplied to the ballast water supply line 107 through the line 109 as necessary. Line 110 may include a heat exchanger (not shown) and a chiller unit (not shown) for controlling the temperature of the sodium hypochlorite aqueous solution.

In FIG. 2B, an example in which the storage tank 211 and the electrolytic cell 212 are connected by the line 213 is shown. The chemical liquid supply device 201 of this embodiment is not limited thereto, and for example, the storage tank ( A line capable of supplying a liquid to the electrolytic cell 212 from 211 may be provided, and the line and line 213 may be circulated between the storage tank 211 and the electrolytic cell 212.

The chemical liquid supply apparatus 201 of the form shown in FIG. 2C may be an apparatus provided with only one processing tank 219. The treatment tank 219 generates sodium hypochlorite by electrolytic treatment and stores sodium hypochlorite aqueous solution. When the treatment tank 219 also serves as a storage tank and an electrolytic bath, the chemical liquid supply device 201 can be further miniaturized, for example.

The killing apparatus 102 is a device for killing aquatic organisms electrically or mechanically. As the killing processing apparatus 102, for example, an electrical processing apparatus in the form shown in FIGS. 3A to 3D can be used. 3A to 3D are schematic configuration diagrams showing an example of the configuration of the fixed bottom electrode electrolytic cell, and FIG. 3A shows an example of a monopolar fixed bottom electrode electrolytic cell arranged in a crossflow manner on the ballast water supply line 107. 3B and C show an example of a bipolar fixed bottom electrode electrolyzer disposed in a cross flow manner on the ballast water supply line 107, and FIG. 3D shows a double electrode disposed in a dead end manner on the ballast water supply line 107. An example of a type fixed bottom type electrode electrolytic cell is shown. 3A to D, the same components are denoted by the same reference numerals.

As shown in FIG. 3A, the monopolar fixed bottom electrode electrolyzer includes an electrolytic cell body 302, a fixed bottom electrode 311, a power feeding electrode 312, and a power source 313. The flow (black arrow in FIG. 3A) is arranged in the ballast water supply line 107 so that the flow (the tangential direction) is horizontal with respect to the membrane surface of the fixed bottom electrode 311. By arranging the fixed bottom electrode electrolytic cell in a cross flow manner, dirt on the membrane surface of the fixed bottom electrode 311 can be easily removed, and pressure loss can be suppressed. When the liquid withdrawn from the intake port 104 is supplied to the fixed bottom electrode electrolyzer, the supplied liquid flows in a direction perpendicular to the membrane surface of the fixed bottom electrode 311 (empty arrow in FIG. 3A). When the aquatic organisms in the liquid come into contact with the fixed bottom electrode 311 by the liquid flow, electrons are exchanged between the surface of the fixed bottom electrode 311 and the cells of the aquatic organisms, thereby weakening the activity of the aquatic organisms. Can destroy, destroy, or damage parts of aquatic life. When the residue or the dirt accumulates on the membrane surface of the fixed bottom electrode 311, these can be easily removed by opening and cleaning the valve disposed in the line 303. One end of the line 303 is connected to the outboard, and the removed residue is discharged to the outboard.

The material of the fixed bottom electrode 311 may be any material that can penetrate the liquid withdrawn from the water intake port 104. For example, a porous material, a carbon-based material, and a metal material, those coated with a noble metal, etc. may be mentioned. Can be. Examples of the carbon-based material include activated carbon, graphite, carbon fiber, and the like. As a metal material, nickel, copper, stainless steel, SUS (stainless steel), iron, titanium, etc. are mentioned, for example. As a material of the fixed bottom electrode 311, among these, SUS and titanium are preferable at the point of strength and corrosion prevention. Although the shape which comprises the fixed bottom electrode 311 is not specifically limited, For example, the pore diameter of the fixed bottom electrode 311 which can mention sphere, particle | grain, fiber, felt, woven fabric, a porous block, etc. For example, it is 100 micrometers or more. As a material of the electrode 312 for power feeding, titanium is preferable, for example. As a shape of the electrode 312 for electric power feeding, a flat plate, an expanded metal, a board with a hole, etc. are mentioned, for example. The power source 313 may be a DC power source or an AC power source, but an AC power source is preferable.

As shown in FIG. 3B, the bipolar fixed bottom electrode electrolyzer includes an electrolyzer body 302, electrode terminals 314 and 315 for power supply, a fixed bottom 316, a spacer 317, and a power source 313. ). The fixed bottom 316 is disposed between the electrode terminals 314 and 315 for power supply, and the spacer 317 is between the electrode terminal 314 and the fixed bottom 316 for power supply, between the fixed bottom 316, And the fixed bottom 316 and the power supply electrode terminal 315, respectively. When an AC power source is used as the power source 313, and the electrode terminals 314 and 315 are supplied with electricity, the membrane faces on the electrode terminal 314 side and the electrode terminal 315 side of the power supply of each fixed bottom 316. This alternating polarization polarizes positive and negative, and a porous positive electrode and a porous negative electrode are formed on the membrane surface of each fixed bottom 316. By using the bipolar fixed electrode electrolytic cell in this manner, the number of fixed bottoms 316 disposed in the electrolytic cell increases, so that the number of times that aquatic organisms come into contact with the fixed bottom 316 can be increased, thereby improving treatment efficiency.

The bipolar fixed bottom electrode electrolytic cell of FIG. 3C is the same as the structure of FIG. 3B except that one fixed bottom 316 is arrange | positioned.

The double-electrode fixed bottom electrode electrolyzer of FIG. 3D is the same as the structure of FIG. 3B except that the dead end system is arrange | positioned instead of the cross flow system, and three fixed bottoms 316 are arrange | positioned.

In the ballast water supply line 107, for example, a valve (not shown) is preferably disposed between the connection portion with the chemical liquid supply line 109 and the killing processing device 102. Accordingly, the liquid (ballast water) to be injected into the ballast tank 103 based on the measured value in the flowmeter FM (not shown) disposed between the ballast pump 106 and the killing apparatus 102. You can control the amount. The valve is preferably an electric valve in that the injection amount into the ballast tank 103 can be easily controlled.

An embodiment of the ballast water treatment using the ballast water treatment system according to the first embodiment 1-1 will be described with reference to FIGS. 4A and 4B.

First, as shown in FIG. 4A, when sailing is complete | finished (S401), it starts to unload (S402). Further, the ballast water is put in and processing is started (S403), and the pump of the ballast pump 106, the killing processing device 102, and the chemical liquid supply line 109 of the chemical liquid supply device 101 is started (S404). ). As a result, the filling of the liquid through the intake port 104 and the treatment of the ballast water are started. The liquid that has entered through the water intake port 104 is supplied to the killing apparatus 102 after large dust or the like is removed from the strainer 105, and the killing treatment of aquatic organisms contained in the liquid is performed. In the killing apparatus 102, by performing electrical or mechanical treatment, a relatively large aquatic organism among the aquatic organisms contained in the withdrawn liquid is separated, removed, destroyed and / or killed. Subsequently, an aqueous sodium hypochlorite solution is supplied from the chemical liquid supply apparatus 101 to the liquid processed by the killing apparatus 102, and the killing treatment of aquatic organisms with sodium hypochlorite is performed. The liquid containing sodium hypochlorite is supplied to the ballast tank 103 via the ballast water supply line 107. The sodium hypochlorite concentration in the aqueous sodium hypochlorite solution supplied is 5000 ppm or more, for example, and the pH is 8-9, for example. This ballast water treatment is performed while controlling the injection amount of ballast water and the supply amount of sodium hypochlorite (S405). When a predetermined amount of ballast water is injected into the ballast tank 103 and the concentration of sodium hypochlorite in the ballast tank 103 is controlled to a predetermined concentration (S406), the introduction and processing of the ballast water are terminated (S407). The pump of the chemical liquid supply line 109 of the ballast pump 106, the killing processing apparatus 102, and the chemical liquid supply apparatus 101 is stopped (S408). After the killing treatment in the killing treatment device 102, the sodium hypochlorite aqueous solution is supplied and killed to efficiently kill the aquatic organisms contained in the withdrawn liquid and / or ballast water in the ballast tank.

Next, as shown in FIG. 4B, when navigation is complete | finished, a deballast is started (S411), the ballast pump 106, and a densitometer are started (S412). Thereby, discharge of the ballast water to the outboard from the ballast tank 103 is started. The ballast water is introduced into the ballast water supply line 107 from the ballast tank 103. The concentration of sodium hypochlorite in the discharged ballast water is measured by the concentration meter arranged in the ballast water supply line 107 (S413). It is determined whether the measured sodium hypochlorite concentration satisfies the emission standard (S414), and if the sodium hypochlorite concentration is less than 0.2 ppm, the discharge standard is discharged to the sea through the intake port 104 (deballast). (S415). When the sodium hypochlorite concentration is 0.2 ppm or more, a neutralizing agent is added (S416), the measurement of the concentration of sodium hypochlorite (S413) and the above judgment (S414) are performed again. When all the ballast water in the ballast tank 103 is discharged, the deballast is terminated and the densitometer and the ballast pump 106 are stopped (S417).

When the deballast and loading ends, the ship departs (S421). During navigation, the pump 116 is started to inject liquid into the chemical liquid supply device 101 through the second intake port 114. In addition, the ballast pump 106 may be started in accordance with the start of the pump 116, and the liquid may be put into the chemical liquid supply device 101 through the sea chest. The temperature control means is activated (S422) to control the temperature of the liquid for generating sodium hypochlorite to an optimum temperature at which decomposition of hypochlorous acid is suppressed. When the storage of the predetermined amount of liquid is completed in the storage tank 211, the pump 116 is stopped (S423). At this time, it is preferable to operate the inverter without stopping the temperature control means. In accordance with the sailing time (porting time), the rectifier, the pump, the blower, etc. in the chemical liquid supply device 101 are started to start electrolysis of the liquid, and sodium hypochlorite is generated to produce an aqueous sodium hypochlorite solution (S424). ). When the concentration of sodium hypochlorite stored in the storage tank 211 becomes a prescribed concentration, for example, 5000 ppm or more (S425), the generation of sodium hypochlorite is terminated (S426). The prepared sodium hypochlorite aqueous solution is stored in the chemical liquid supply device 101. The pH of the stored sodium hypochlorite aqueous solution is 8-9, for example. After production of the aqueous sodium hypochlorite solution, the temperature control means is preferably operated without stopping until the aqueous sodium hypochlorite solution is supplied.

The production of the aqueous sodium hypochlorite solution and the supply of the aqueous sodium hypochlorite solution in the chemical liquid supply device 101 can be controlled by, for example, a ballast water control system as shown in FIG. 5. 5 is a functional block diagram illustrating an example of a ballast water control system configuration. The ballast water control system of FIG. 5 includes a measuring unit 501 including a concentration meter and the like in the ballast water supply line 107, a recording unit 502 for recording the sodium hypochlorite concentration measured by the measuring unit 501, And on the basis of the concentration data of the recording unit 502, the supply amount of sodium hypochlorite from the chemical solution supply device 101, the increase or decrease of the injection amount of the ballast water into the ballast tank 103, and the like are determined. The control part 503 which controls the amount of sodium hypochlorite, the injection amount of ballast water, etc. which are supplied to the ballast tank 103 is provided.

The measuring unit 501 may have a configuration as shown in the measuring unit 601 of FIG. 6. That is, the measurement unit 501 is in addition to the sodium hypochlorite concentration meter in the ballast water supply line 107, the sodium hypochlorite concentration meter of the storage tank 211 of the chemical liquid supply device 101, the hypochlorous acid of the deballast line. And one or more sodium hypochlorite concentration meters at the discharging end. The measurement result in the measuring unit 501 may be recorded in the recording unit 502.

The recording unit 502 can record one or more pieces of data as shown in the recording unit 602 of FIG. 6. That is, the concentration of sodium hypochlorite stored in the storage tank 211 measured by the measuring unit 601, the ballast time (ballast water treatment time), the ballast amount accommodated in the ballast tank 103, navigation data (at least the time until drainage It is preferable to include), the supply amount of the sodium hypochlorite aqueous solution, the sodium hypochlorite concentration, the deballast time and the deballast amount of the liquid after the aqueous sodium hypochlorite solution in the ballast water supply line 107, the post-treatment device The sodium hypochlorite concentration of the ballast water after treatment, the supply amount of the reducing agent, and the sodium hypochlorite concentration after the reducing agent supply may be included. The recording unit 602 can also record the sodium hypochlorite concentration range to be maintained in the ballast tank 103.

The control unit 503 can be configured as shown in the control unit 603 of FIG. 6. That is, the controller 603 may include an analysis unit 611, a sodium hypochlorite generation control unit 612, and a supply amount control unit 613. For example, the analyzer 611 supplies the sodium hypochlorite aqueous solution supplied to the ballast water supply line 107, the supplying amount of the reducing agent, and the chemical liquid supply device 101 from the data recorded in the recording unit 602. The amount of sodium hypochlorite to be generated is determined. The sodium hypochlorite generation control unit 612 controls, for example, the amount of sodium hypochlorite generated in the chemical liquid supply device 101 based on the determination. The supply amount control unit 613 controls, for example, the amount of sodium hypochlorite to be supplied from the chemical liquid supply device 101 to the ballast tank 103 based on the determination.

In Embodiment 1-1, the chemical liquid supply device 101 adds an aqueous sodium hypochlorite solution to the liquid processed between the killing device 102 and the ballast tank 103, that is, the killing device 102. Although the form to supply was demonstrated as an example, this invention is not limited to this. For example, as shown in FIG. 7, even if the chemical liquid supply line 109 is connected between the ballast pump 106 and the killing apparatus 102, even if it is a form which supplies the sodium hypochlorite aqueous solution to the liquid before a killing process, do. Moreover, as shown in FIG. 8, the chemical | medical solution supply line 109 which the chemical liquid supply apparatus 101 connects between the killing processing apparatus 102 and the ballast tank 103, the ballast pump 106, and the killing process It may be a form which has the 2nd chemical liquid supply line 809 connected between the apparatuses 102, and supplies sodium hypochlorite aqueous solution to the liquid before a killing process and after a killing process, respectively.

(Embodiment 1-2)

It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 1-2 of this invention. In FIG. 9, the same code | symbol is attached | subjected to the same component as FIG.

The ballast water treatment system of the present embodiment 1-2 deballasts the line 902 for supplying the ballast water in the post-treatment apparatus 901, the ballast tank 103 to the post-treatment apparatus 901, and the ballast water. The same configuration as that of the ballast water treatment system of Embodiment 1-1 is provided except that a discharge line (deballast line) 903 and a reducing agent supply device (reducing agent storage tank) 904 are provided. According to the ballast water treatment system of this Embodiment 1-2, in order to provide the after-treatment apparatus 901, the usage-amount of a reducing agent can be reduced.

The line 902 has one end connected to the ballast water supply line 107, the other end connected to the post-treatment device 901, and the ballast tank to the post-treatment device 901 through the ballast water supply line 107. The ballast water in 103 can be supplied.

The post-treatment apparatus 901 is a device for performing a treatment for reducing the sodium hypochlorite concentration of the ballast water to the discharge standard or less and / or reducing the amount of reducing agent used during discharge of the ballast water.

The reducing agent supply device 904 is for reducing sodium hypochlorite in the discharged ballast water so that the sodium hypochlorite concentration is lower than the discharge standard. The reducing agent supply device 904 is connected to the discharge line 903 and can supply the reducing agent to the discharge ballast water treated by the post-treatment device 901. Examples of the reducing agent include sodium thiosulfate and sodium sulfite.

The discharge line 903 is a microbial inspection apparatus for measuring the number of live cells of aquatic organisms (especially microorganisms) contained in the sodium hypochlorite concentration meter to measure the sodium hypochlorite concentration of the ballast water to be discharged and the ballast water to be discharged. The apparatus may be provided. As shown in Fig. 9, the sodium hypochlorite concentration meter is disposed at least between the aftertreatment device 901 and the ballast pump 106 and at the discharge end (near the discharge port of the ballast water) of the discharge line 903. It is preferable.

One embodiment of the ballast water treatment at the time of ballast water discharge using the ballast water treatment system of the present embodiment 1-2 will be described.

The ballast pump 106 is driven to start discharging the ballast water from the ballast tank 103. The ballast water in the ballast tank 103 is supplied to the aftertreatment apparatus 901 via the ballast water supply line 107 and the line 902. In the post-treatment apparatus 901, the ballast water subjected to the decomposition treatment of sodium hypochlorite is supplied to the killing apparatus 102 through the discharge line 903 and discharged out of the ship. At this time, in the killing apparatus 102, you may process the aquatic organism contained in the discharged ballast water.

In addition, although the embodiment 1-2 demonstrated the form which the discharge line 903 connects with the killing apparatus 102 as an example, this invention is not limited to this. For example, the discharge line 903 does not need to be connected to the killing apparatus 102. In other words, the ballast water may be discharged without passing through the killing apparatus 102.

(Embodiment 1-3)

It is a schematic block diagram which shows the structure of the ballast water treatment system in embodiment 1-3 of this invention. In FIG. 10, the same code | symbol is attached | subjected to the same component as FIG.

The ballast water treatment system of the present embodiment 1-3 includes an acidic liquid storage tank 1001 for controlling the pH of the liquid supplying the aqueous sodium hypochlorite solution to pKa or less of sodium hypochlorite, and the ballast water supply line 107. Except having a pH meter, it is the same as that of the ballast water treatment system of Embodiment 1-1.

The ballast water treatment system of the present embodiment 1-3 includes the acidic liquid storage tank 1001 to control the pH of the liquid supplying sodium hypochlorite to a range optimal for the killing ability of hypochlorous acid, and in that state. Sodium hypochlorite can be supplied and killed. For this reason, the treatment efficiency of the killing treatment of aquatic organisms with sodium hypochlorite can be improved. As an optimal pH, it is 4-6, for example, Preferably it is about 5.

(Embodiment 1-4)

It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 1-4 of this invention. In FIG. 11A, the same components as those in FIG. 1 are denoted by the same reference numerals.

The ballast water treatment system according to the present embodiment 1-4 includes the ballast water supply line 107, the chamber 1101 disposed in the ballast water supply line 107, and the electrical killing process disposed at the outlet of the chamber. The apparatus 102 and the chemical | medical solution supply apparatus 101 for supplying the sodium hypochlorite aqueous solution to the ballast water supply line 107 are provided. According to the ballast water treatment system of this embodiment 1-4, the ballast water taken out from the water intake port 104 can be supplied to the electric killing apparatus 102 while temporarily storing in the chamber 1101. For this reason, the flow velocity of the ballast water supplied to the electrical killing apparatus 102 can be made substantially constant, and the frequency | count of contacting the aquatic organisms in a ballast water with the electrical killing apparatus 102 (especially fixed bottom) is increased. This can improve the killing efficiency. The ballast water treatment system according to the first embodiment of the present invention is the first embodiment except that the ballast water treatment system is provided with the chamber 1101 and the electric killing apparatus 102 is disposed at the outlet of the chamber 1101. It is the same as the structure of the ballast water treatment system of -1.

The ballast water processing using the ballast water treatment system of the present embodiment 1-4 is performed as follows, for example. First, the ballast water withdrawn from the water intake port 104 is introduced into the chamber 1101 through the ballast water supply line 107, and then supplied to the electrical killing apparatus 102 through the outlet of the chamber 1101. . Electrical killing treatment is performed here. The slaughtered ballast water is introduced into the ballast water supply line 107, and then, the aqueous sodium hypochlorite solution is supplied from the chemical liquid supply device 101, and the ballast tank 103 is supplied through the ballast water supply line 107. It is stored.

It is preferable that the diameter of the chamber 1101 is larger than the pipe diameter of the ballast water supply line 107, and it is enlarged in the taper shape toward the inside of the chamber 1101 from the connection part with the ballast water supply line 107. More preferred. According to this configuration, the flow rate of the ballast water in the chamber 1101 can be made slower than the flow rate in the ballast water supply line 107. For this reason, the number of times that the aquatic organisms in the ballast water contact the electric killing apparatus 102 can be further increased. The outlet of the chamber 1101 is preferably formed at the bottom of the chamber 1101. According to this structure, the ballast water discharged | emitted from the bottom part of the chamber 1101 can be processed by the electric killing apparatus 102. FIG. When the flow velocity in the chamber 1101 becomes slow, since the aquatic organisms in the ballast water accumulate in the bottom of the chamber 1101 due to the specific gravity difference with the ballast water, the number of times that the aquatic organisms and the electric killing device 102 contact each other Can be increased further.

The ballast water supply line 107 may further be provided with the filter. 11B, the schematic block diagram which shows another example of the structure of the ballast water treatment system in this Embodiment 1-4 is shown. In FIG. 11B, the same components as those in FIG. 11A are denoted by the same reference numerals. According to the ballast water treatment system of a 1st aspect, the filter 1102 is provided, for example, the plankton in ballast water supplied to a ballast tank, and the carcass of the aquatic organism which carried out the killing process by the electrical killing apparatus 102, for example. Etc. can be captured.

In FIG. 11B, although the filter 1102 is arrange | positioned between the connection part with this chemical | medical agent supply apparatus 101, and the ballast tank 103, this invention is not limited to this, For example, a killing apparatus You may arrange | position between 102 and the ballast tank 103. The number of the filters 1102 is not particularly limited, and may be one or two or more. When arranging two or more filters, for example, as shown in FIG. 11B, the ballast water supply line 107 may be branched, and one filter may be arranged in each of them. Although the filter 1102 is not specifically limited, For example, the filter whose hole diameter is 10-200 micrometers can be used.

12 is a partial view showing a part of the ballast water treatment system according to the first to fourth embodiments. 12A and B are views showing the portion of the ballast water supply line 107 which connects the killing processing device 102 and the chemical liquid supplying device 101 (the part enclosed by the broken line in FIG. 11A) to be taken out. An example of the form of the part which connects the processing apparatus 102 and the chemical | medical solution supply apparatus 101 is shown. The portion connecting the killing processing device 102 and the chemical liquid supplying device 101 may be, for example, a refracting portion refracted in a crank shape, as shown in FIG. 12A, and as shown in FIG. 12B. It may be an inclined portion formed with a gentle rising gradient from 102 to the chemical liquid supply device 101. When the ballast water supply line 107 has a refraction portion, the chemical liquid supply device 101 is preferably arranged near the upper end of the refraction portion, as shown in Fig. 12A. In the case where the ballast water supply line 107 has an inclined portion, the chemical liquid supply device 101 is preferably arranged near the upper end of the inclined portion, as shown in Fig. 12B. According to these aspects, for example, the aqueous sodium hypochlorite solution supplied from the chemical liquid supply device 101 can be supplied to the killing apparatus 102. Thereby, the sterilization process by the sodium hypochlorite of the liquid which remains in the killing apparatus 102 can be performed. Although it will not restrict | limit especially if it is a gradient and a gentle gradient, It is 1/200 or more, Preferably it is 1/100 or more and 1/50 or less. The valve may be arranged on the inclined portion. Thereby, the amount of the sodium hypochlorite aqueous solution supplied to the killing apparatus 102 can be controlled.

In Embodiment 1-4, the order of supply of the sodium hypochlorite aqueous solution and the order of an electrical killing apparatus is not specifically limited, You may supply the sodium hypochlorite aqueous solution before performing the process of an electrical killing apparatus.

(Embodiment 1-5)

It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 1-5 of this invention. In FIG. 13, the same code | symbol is attached | subjected to the same component as FIG.

The ballast water treatment system according to the present embodiment 1-5 includes a ballast water supply line 107, a chemical liquid supply device 101 for supplying an aqueous sodium hypochlorite solution to the ballast water supply line 107, and a ballast. A chamber 1301 disposed in the water supply line 107 and an electrical killing apparatus 1302 are provided, and the electrical killing apparatus 1302 is disposed in the chamber 1301. According to the ballast water treatment system of this embodiment 1-5, since the electric killing apparatus 1302 is disposed in the chamber 1301, the ballast water introduced from the ballast water supply line 107 is stored in the chamber 1301. While storing, the killing process by the electrical killing apparatus 1302 can be performed. As a result, the flow rate of the ballast water can be made slower than the flow rate in the ballast water supply line 107, and the number of times that the aquatic organisms in the ballast water contacts the electric killing apparatus 1302 can be increased. The ballast water treatment system of this embodiment 1-5 is the same as the configuration of the ballast water treatment system of the embodiment 1-1 except that the killing apparatus 1302 is disposed in the chamber 1301.

For example, the ballast water treatment using the ballast water treatment system according to the first embodiment of the present invention can be performed as follows. First, the ballast water withdrawn from the water intake port 104 is introduced into the chamber 1301 through the ballast water supply line 107, where electrical killing of aquatic organisms in the ballast water is performed. It is preferable that the electrical killing apparatus 1302 is disposed in a portion of the chamber 1301 that has a slow flow rate, for example, near the bottom of the chamber 1301. When the flow rate is lowered, since the aquatic organisms in the ballast water are stagnated in the portion due to the specific gravity difference with the ballast water, the number of times that the aquatic organisms and the electric killing device 1302 contact each other can be further increased. Next, the treated liquid is introduced into the ballast water supply line 107 from the chamber 1301, and an aqueous sodium hypochlorite solution is supplied from the chemical liquid supply device 101, and then introduced into the ballast tank 103.

The discharge port of the chamber 1301 is preferably formed above the chamber 1301. Thereby, the aquatic biomass in the liquid introduced into the ballast water supply line 107 can be reduced. It is preferable that the discharge port of the chamber 1301 is formed at a position lower than the introduction port of the chamber 1301. In addition, the diameter of the outlet of the chamber 1301 is preferably larger than the diameter of the inlet. According to these configurations, the flow rate of the ballast water in the chamber 1301 is slower than the flow rate in the ballast water supply line 107, further increasing the number of times that the aquatic organisms in the ballast water contact the electric killing device 1302. You can. In the chamber 1301, the ratio of the diameter of the outlet to the diameter of the inlet (outlet: the inlet) is not particularly limited, but may be 1: 1.2 to 1.5. Moreover, it is preferable that the diameter of the line connected to the discharge port gradually increases from the chamber 1301 toward the chemical liquid supply device 101. As a result, an increase in pressure loss can be suppressed.

The chamber 1301 may further be equipped with rectifying parts, such as a baffle. Thereby, the flow velocity in the chamber 1301 can be easily fixed. In addition, it is preferable to arrange | position a rectifying member on the upper part of the electrical kill processing apparatus 1302. According to this configuration, more aquatic organisms in the ballast water can be collected on the electric killing apparatus 1302 side, and the number of contact with the electric killing apparatus 1302 can be further increased to improve the killing treatment efficiency.

A line (not shown) connected at one end to an outboard or discharge line may be connected to the bottom of the chamber 1301. Through this line, the residues, dust, and the like accumulated in the chamber 1301 and the electric killing apparatus 1302 can be discharged out of the ship.

In the ballast water supply line 107, the portion connecting the killing processing device 102 and the chemical liquid supplying device 101 may be a refracting portion refracted in a crank shape as in Embodiment 1-4. It may be an inclined portion in which a gentle rising gradient is formed from the processing apparatus 102 toward the chemical liquid supply apparatus 101. According to this aspect, for example, the aqueous sodium hypochlorite solution supplied from the chemical liquid supply apparatus 101 can be supplied to the chamber 1301 in which the killing apparatus 102 is disposed. Thereby, the sterilization process by the sodium hypochlorite of the liquid which remains in the chamber 1301 can be performed.

In this Embodiment 1-5, the order of supply of the sodium hypochlorite aqueous solution and the process by an electric killing apparatus is not specifically limited to this order, Sodium hypochlorite before performing the process of an electrical killing apparatus. You may supply aqueous solution.

(Embodiment 1-6)

It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 1-6 of this invention. In FIG. 14, the same code | symbol is attached | subjected to the same component as FIG.

The ballast water treatment system in this embodiment 1-6 includes a ballast water supply line 107, a chemical liquid supply device 101 for supplying an aqueous sodium hypochlorite solution to the ballast water supply line, and a ballast water supply line. And a chamber 1301 disposed in the chamber 107 and an electric killing apparatus 1302 disposed in the chamber 1301, and the chemical liquid supply device 101 is configured to take water for collecting the liquid for sodium hypochlorite generation. Having a line 1410, the intake line 1410 is connected to an intake port 104 to which the ballast water supply line is connected, and also has a water intake pump different from the ballast water intake pump 106 (e.g., a ballast pump). 116. In the ballast water treatment system of the present embodiment 1-6, the chemical liquid supply device 101 has a water intake line 1410 to be connected to the intake port (C chest) 104, and the intake line 1310 is a ballast pump ( Except having the water intake pump 116 different from 106, it is the same as the structure of the ballast water treatment system of Embodiment 1-5.

According to the ballast water treatment system of this embodiment 1-6, since the intake pump 116 different from the ballast pump 106 is provided, it can take in water without driving the ballast pump 106 or the like. For this reason, for example, even with the navigation in progress, liquid withdrawal and sodium hypochlorite can be easily generated.

Second Aspect

In another aspect, the present invention also provides a chemical solution supplying a ballast water supply line for supplying the liquid withdrawal from the water inlet to the ballast tank, and an aqueous sodium hypochlorite solution for sterilizing aquatic microorganisms in the liquid to the line. In the ballast water treatment system provided with the apparatus, the liquid in the said line supplied with the predetermined amount of sodium hypochlorite was supplied from the said chemical liquid supply apparatus, the attenuation of the sodium hypochlorite concentration in the sample sample was measured, and It relates to a ballast water control method (hereinafter also referred to as "control method of ballast water of the present invention") including adjusting the amount of sodium hypochlorite supplied from said chemical liquid supply device to said line based on measurement data. .

In the present invention of the second aspect, the degree of attenuation of sodium hypochlorite for sterilizing aquatic microorganisms in ballast water differs depending on the liquid to be treated, that is, the sodium hypochlorite attenuation is, for example, It is based on the knowledge that it is affected by the type and amount of microorganisms or organic matter in the seawater. In the present invention, the sodium hypochlorite attenuation is measured by using the withdrawn liquid, and the sodium hypochlorite concentration of the ballast water in the ballast tank after the completion of watering is controlled by controlling the supply amount of sodium hypochlorite using the attenuation data. Based on the knowledge that more control is possible.

As described above, the ballast water management treaty has been adopted, and the installation of the ballast water treatment device is mandatory, so that a new technology capable of treating the ballast water is required. Above all, if excessive sodium hypochlorite is present in the ballast water, a reducing agent is required at the time of discharge, or time for leaving is required, and therefore, a new technique regarding the control of the sodium hypochlorite concentration in the ballast water is expected. have. Here, as a 2nd aspect, this invention provides the new processing system which can control the sodium hypochlorite concentration of ballast water.

According to this invention of a 2nd aspect, it has the effect that the sodium hypochlorite concentration of ballast water in a ballast tank can be controlled, injecting ballast water. In addition, according to the present invention, preferably, the sodium hypochlorite concentration control according to the withdrawn liquid can be controlled. Moreover, according to this invention of a 2nd aspect, there exists an effect that sodium hypochlorite becomes excess in a ballast tank, and a large amount of reducing agent is used for waste water, or it can avoid to leave for time.

According to the ballast water control method of the present invention, it is judged by injecting whether or not the sodium hypochlorite supply amount, which is a standard initially added to the withdrawn liquid, is excessive or insufficient with respect to the target concentration range in the ballast water after pouring water. By adjusting the supply amount added to the withdrawn liquid, the sodium hypochlorite concentration according to the withdrawn liquid can be controlled. Therefore, according to the control method of the ballast water of this invention, a disinfection effect is not exhibited because sodium hypochlorite is insufficient in a ballast tank, or sodium hypochlorite becomes excess, and a large amount of reducing agents or long-term neglect is left at the time of drainage. It has the effect of avoiding the need.

In the second aspect, "sterilization treatment of aquatic microorganisms" includes sterilizing at least a part of aquatic microorganisms contained in the liquid and / or ballast water to be treated, and inhibiting the growth of aquatic microorganisms. In addition, in this specification, the "sterilization process of aquatic microorganisms" should just sterilize aquatic microorganisms at least, and may sterilize the organism larger than aquatic microorganisms, other organisms, etc. with the sterilization process of aquatic microorganisms. The sterilization treatment of the aquatic microorganisms preferably includes managing the sodium hypochlorite concentration in the ballast tank so as to satisfy the ballast water discharge standard shown in Table 1 at the time of discharge of the ballast water, more preferably, the ballast water. At the time of discharging of the gas, the sterilization treatment is performed so as to satisfy the ballast water discharge standard shown in Table 1 above.

In the second aspect, the "chemical liquid supply apparatus" is an apparatus for supplying an aqueous sodium hypochlorite solution to the withdrawn liquid and / or ballast water, which is in the form of an apparatus for generating sodium hypochlorite by electrolysis, sodium hypochlorite or The form of the apparatus which stores this aqueous solution may be sufficient. As a chemical | medical solution supply apparatus using electrolysis, the form provided with an electrolytic cell and a storage tank is mentioned as mentioned later. Since the chemical liquid supply device using electrolysis can produce sodium hypochlorite using seawater, for example, it can sterilize aquatic microorganisms without using special chemicals such as sterilizers imported from the outboard. . Supply to storage tanks, such as seawater, may be performed from a ballast water supply line through a pump or a valve, or may be taken in directly from the ship. It is preferable to take water directly from the ballast water supply line rather than from the ballast water supply line from the point of simply taking water during navigation. In addition, the produced sodium hypochlorite is stored in a storage tank in the form of an aqueous solution, and is supplied to a ballast water supply line through a pump or a valve. Instrument which can measure concentration of sodium hypochlorite so that chemical liquid supply device can grasp quantity of sodium hypochlorite supplied to ballast water supply line (henceforth "sodium hypochlorite concentration meter" or simply "density meter") And a flow meter.

Moreover, it is preferable that the chemical | medical solution supply apparatus using electrolysis is equipped with the sodium chloride aqueous solution storage tank and / or the sodium chloride storage tank from a viewpoint of processing efficiency improvement. By providing an aqueous sodium chloride storage tank and / or a sodium chloride storage tank, the aqueous sodium chloride solution / sodium chloride can be stored in the tank, and the aqueous sodium chloride solution / sodium chloride can be supplied to the electrolytic cell as necessary. As a result, for example, even in a ship that takes in ballast water in a fresh water region, sodium hypochlorite can be generated and sterilization treatment with sodium hypochlorite can be performed.

In the second aspect, "navigation data" refers to data including navigation time, time to drainage, water quality of the intake port, weather situation in the navigation sea area, and / or information relating to those obtained during navigation.

In a 2nd aspect, "attenuation of sodium hypochlorite" means that the sodium hypochlorite concentration in the ballast water which received sodium hypochlorite from the chemical liquid supply apparatus is reduced. An example of the attenuation curve of sodium hypochlorite is shown in FIG. The curve of the solid line of FIG. 20 shows the change of the sodium hypochlorite concentration in model seawater. In general, when sodium hypochlorite is dissolved in seawater, a sharp drop in concentration is initially observed (time 0 to time t3). Thereafter, a nearly stable concentration dx is obtained (time t3 to time).

However, the degree of attenuation of sodium hypochlorite is also influenced by the type and amount of microorganisms, organic matter, and / or other underwater components in the withdrawn liquid. The dotted line curve of FIG. 20 is an example in the case where the concentration dy when the seawater actually taken is substantially stabilized is Δd lower than the model seawater. In addition, although FIG. 20 demonstrates the case where the degree of attenuation in the seawater actually taken in is larger than the model seawater, the degree of attenuation in the seawater taken in may be smaller than the model seawater. Therefore, even if sodium hypochlorite is supplied according to only the attenuation expected in advance (damping in the model seawater), if there is a concentration difference Δd when a stable situation is reached between the seawater actually taken, hypochlorous acid The sodium concentration may be insufficient or excessive.

Therefore, in order to more accurately predict or control the sodium hypochlorite concentration in the ballast water when the ballast water is completed, it is important to know the degree of reduction of sodium hypochlorite in the withdrawn liquid. Here, one form of the ballast water control method of this invention measures attenuation of sodium hypochlorite in the ballast water poured in parallel, watering ballast water, and from the said chemical | medical solution supply apparatus based on the measured data. Controlling the amount of sodium hypochlorite supplied to the line. The adjustment of the supply amount is based on the attenuation measurement data to predict the sodium hypochlorite concentration in the ballast tank at the completion of a ballast water feed, a predetermined time elapse, or at the time of discharge of the ballast water, based on the prediction. Determining the increase or decrease of the amount of sodium hypochlorite supplied from the chemical liquid supply device to the ballast water supply line, and controlling the amount of sodium hypochlorite supplied to the line based on the determination.

The adjustment of the supply amount from the said chemical liquid supply apparatus based on the attenuation data of sodium hypochlorite can be performed specifically as follows, for example. Since the attenuation of the sodium hypochlorite using the model seawater can be measured in advance, based on the model measurement data and the information such as the flow rate of the liquid to be withdrawn, the initial supply amount of the sodium hypochlorite to be supplied can be determined. Next, the attenuation is measured using the withdrawn liquid and compared with previously measured model measurement data, for example, Δd of FIG. 20 is calculated. Based on these data, a high degree of attenuation increases the supply amount, and a low degree of attenuation reduces the supply amount. By performing such adjustment, it becomes possible to make sodium hypochlorite concentration in a ballast tank be in a desired range.

Attenuation of sodium hypochlorite in the withdrawn liquid can be performed by measuring the concentration of sodium hypochlorite at predetermined intervals. For example, the measurement is performed in the time t1 to t6 shown in FIG. 20 to obtain attenuation data. The measurement interval is, for example, 20 minutes to 1.5 hours, preferably 30 minutes to 1 hour. The number of measurements is preferably a range in which the attenuation curve can be predicted from the necessity of performing the attenuation measurement in parallel with the water to the ballast tank and adjusting the hypochlorous acid concentration to be supplied as necessary. In Fig. 20, six measurements of t1 to t6 are illustrated. If the attenuation curve can be predicted, the number of measurements can be reduced.

In one aspect of the method for controlling ballast water of the present invention, the attenuation measurement of sodium hypochlorite is performed by sampling the ballast water of the ballast water supply line after the sodium hypochlorite is supplied from the chemical liquid supply device. Therefore, as a sampling point of the sample for attenuation measurement, the connection point of a chemical | medical solution supply apparatus and a ballast water supply line, and the ballast water supply line between a ballast tank are preferable. In addition, it is preferable that the said sampling and attenuation measurement are performed in the attenuation measuring unit provided with the concentration meter of sodium hypochlorite. In one embodiment, sampling is performed only once after starting water injection, and the attenuation data of sodium hypochlorite can be obtained based on this sample, and the control method of the ballast water of this invention can be performed. In addition, in another embodiment, sampling is performed in multiple times, and attenuation data of several sodium hypochlorite can be obtained, and the control method of the ballast water of this invention can be performed. When sampling is performed a plurality of times, a sample can be measured by using a single attenuation measuring unit, or a plurality of samples sampled simultaneously or by staggering time can be measured using a plurality of attenuation measuring units. can do.

As another aspect, the present invention relates to a ballast water pouring method comprising controlling the concentration of sodium hypochlorite in the ballast water by the method for controlling the ballast water of the present invention.

This invention further relates to the ballast water treatment system which can perform the ballast water control method of this invention as another aspect, and the ship provided with this ballast water system.

That is, as another aspect, the present invention is a chemical solution for supplying a ballast water supply line for connecting a water intake port and a ballast tank, and an aqueous sodium hypochlorite solution for connecting to the line and sterilizing aquatic microorganisms in the liquid. A damping measurement unit arranged between the supply device, the connection point of the line and the chemical liquid supply device, and a ballast tank, for sampling the liquid in the line to measure sodium hypochlorite concentration, and recording the measured data with the attenuation measuring unit And a control unit for controlling the amount of sodium hypochlorite supplied from the chemical liquid supplying device to the line through the connection point in the ballast water feed water, and the control unit based on the decay rate data of sodium hypochlorite. At the completion of several weeks, after a predetermined time, and / or discharge of ballast water A ballast water treatment system, comprising predicting sodium hypochlorite concentration in the ballast tank, determining the increase or decrease in the amount of sodium hypochlorite supplied from the chemical liquid supply device, and controlling the amount of sodium hypochlorite supplied to the line (hereinafter, "The 2nd ballast water treatment system of this invention."

The control unit is further configured based on at least one of the accumulated main water supply amount of the ballast water, the accumulated supply amount of sodium hypochlorite, the navigation data, and the predetermined sodium hypochlorite concentration to be maintained in the ballast tank at the time before the control. The prediction and the determination may be performed. In addition, ballast water may exist in ballast tank water before water injection. For this reason, the ballast tank is provided with a meter which can measure the capacity of ballast water, such as a liquid level meter, and the instrument which can measure the sodium hypochlorite density | concentration in a ballast tank, and includes the said information, and the said prediction and / or the said It is desirable to make a decision.

EMBODIMENT OF THE INVENTION Below, this invention is demonstrated in detail, showing preferred embodiment. However, this invention is not limited to embodiment shown below.

(Embodiment 2-1)

It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 2-1 of this invention.

As shown in FIG. 15, the ballast water treatment system of this Embodiment 2-1 includes the chemical | medical solution supply apparatus 101 and the attenuation measurement unit 112. As shown in FIG. The chemical liquid supply device 101 is connected to the ballast water supply line 107 through lines 108 and 109. Line 108 is a line for supplying the withdrawn liquid (ballast water) to the chemical liquid supply device 101 before the aqueous sodium hypochlorite solution of the ballast water supply line 107 is added. The line 109 is a line for supplying the sodium hypochlorite aqueous solution from the chemical | medical solution supply apparatus 101 to the ballast water supply line 107. FIG. In addition, in place of the line 108 for conveying the liquid withdrawn from the ballast water supply line 107 to the chemical liquid supply device 101, a liquid (sea water or the like) may be directly received from the outside by the line 110. The lines 108-110 may be provided with the pump for conveying liquid. In addition, the line 109 preferably includes a sodium hypochlorite concentration meter and a flow meter in order to measure the amount of sodium hypochlorite supplied to the ballast water supply line 107, and the flow meter includes an integrated flow meter capable of measuring the total flow rate. It is preferable that it is (FM). In addition, in FIG. 15, the lines 108-110 show the form provided with the pump, respectively, but this invention is not limited to this form, For example, it replaces this pump, and the chemical liquid supply apparatus 101 is provided. The liquid may be conveyed by a built-in pump (not shown). The line 109 may be connected to the sea chest 104 instead of the ballast water supply line 107.

One end of the ballast water supply line 107 is connected to the ballast tank 103. Usually, the ballast tank 103 is a form containing several ballast tanks 103a-103d. At the other end, the ballast water supply line 107 is connected to an intake port (sea chest), a strainer 105, and a ballast pump 106 that take in the ballast water. Moreover, between the connection point of the line 109 and the ballast water supply line 107 to which sodium hypochlorite is shared, and the ballast tank 103, the flowmeter FM, the sodium hypochlorite concentration meter C, and the damping measurement Unit 112 is disposed.

The attenuation measuring unit 112 samples the ballast water from the line 111 after the start of ballast water injection, and repeatedly measures the sodium hypochlorite concentration with time. As described above, by measuring in this way, it is possible to analyze how the sodium hypochlorite in the withdrawn liquid is reduced, and the amount of sodium hypochlorite supplied from the line 109 can be adjusted. Further, even while the attenuation measurement unit 112 measures the attenuation, it is possible to continue without stopping the number of ballast water cycles in parallel, thereby preventing the loss of time.

As the chemical liquid supply device 101 using electrolysis, for example, the chemical liquid supply device 201 shown in FIG. 16 can be used. It is a schematic block diagram which shows an example of the structure of the apparatus which can sterilize aquatic microorganisms using electrolysis. As shown in FIG. 16, the chemical liquid supply device 201 includes a storage tank 211 and an electrolytic tank 212. The storage tank 211 and the electrolytic cell 212 are connected by lines 213 and 214. The liquid in the storage tank 211 is conveyed to the electrolytic cell 212 via the line 213, and the sterilization treatment by the electrolytic treatment is performed in the electrolytic cell 212. Subsequently, the liquid processed in the electrolytic cell 212 is conveyed to the storage tank 211 via the line 214. It is preferable to circulate between the storage tank 211 and the electrolytic cell 212 by the lines 213 and 214 from a viewpoint of producing | generating and storing sodium hypochlorite.

In such a chemical liquid supply apparatus 201, since electrolytic treatment is used, sterilization treatment of aquatic microorganisms in a liquid can be performed, for example, without using special chemicals such as a sterilizing agent imported from the outboard. In the electrolytic cell 212, it is preferable to generate sodium hypochlorite by electrolytically treating sodium chloride contained in the liquid, and to sterilize the aquatic microorganisms in the liquid by using the generated sodium hypochlorite.

In the chemical liquid supply device 201, the storage tank 211 is a tank for storing the untreated and / or treated liquid, and the storage tank 211 is an electrolysis line and a line 213 for introducing a liquid that performs electrolysis. It is connected with the line 214 for discharging the later liquid, respectively. Storage tank 211 may be connected to lines 108, 109, and 110.

It is preferable that the storage tank 211 is equipped with the concentration meter of sodium hypochlorite. Accordingly, the concentration of sodium hypochlorite in the storage tank 211 can be managed, and the amount of liquid supplied to the storage tank 211, the electrolytic cell 212, according to the concentration of sodium hypochlorite in the storage tank 211. And / or the processing of the ballast water in the chemical liquid supply device 201 such as the amount of liquid conveyed to the ballast water supply line 107 and the like.

In addition, as the chemical liquid supply apparatus 101 using electrolysis, the chemical liquid supply apparatus 201 shown to FIGS. 2A-B can be used.

The ballast water treatment system of the present embodiment 2-1 further includes a recording unit for recording the data measured by the attenuation measurement unit, and sodium hypochlorite supplied to the line through the connection point from the chemical liquid supply device in the ballast water main water. It is preferable to have a control part for controlling the amount. Based on the decay rate data of sodium hypochlorite, the control unit predicts the sodium hypochlorite concentration in the ballast tank at the completion of the ballast water doubling, a predetermined time elapse, or at the discharge of the ballast water, and the hypothesis from the chemical liquid supply device. By increasing or decreasing the supply amount of sodium chlorate, it is possible to control the amount of sodium hypochlorite supplied to the line.

As the attenuation measurement unit, for example, an apparatus as described in FIG. 21 can be used. In the attenuation measurement unit 112 of FIG. 21, the sample sampled from the ballast water supply line 107 passes through the line 111 and is poured into the container 701. The attenuation measurement unit 112 includes a stirrer 703 driven by the motor M in that the concentration of the concentration in the container 701 is maintained. Samples in the vessel 701 are periodically passed through the line 702 by the pump P and measured by the densitometer C.

(Embodiment 2-2)

Fig. 17 is a functional block diagram showing the configuration of the ballast water control system according to the embodiment 2-2 of the present invention. Embodiment 2-2 relates to a ballast water control system that can be applied to a ballast water treatment system as shown in FIG. 15. That is, the ballast water control system 170 of FIG. 17 includes a measuring unit 171 including the attenuation measuring unit 112 and a recording unit 172 for recording the decay rate data of sodium hypochlorite measured by the measuring unit 171. On the basis of the attenuation rate data of the recording unit 172, and the increase or decrease of the amount of sodium hypochlorite supplied from the chemical liquid supply device 101 is controlled, and the amount of sodium hypochlorite supplied to the ballast water supply line 107 is controlled. The control unit 173 is provided. In addition, the ballast water control system 170 of FIG. 17 may be included as a component part in the ballast water treatment system of the present embodiment 2-1 shown in FIG. 15.

The measurement part 171 may be the same structure as shown in the measurement part 181 of FIG. That is, the measurement unit 181 is in addition to the attenuation measurement unit 112, the flow meter (FM) and sodium hypochlorite concentration meter (C) disposed in the ballast water supply line 107, and the chemical liquid supply device 101 The sodium hypochlorite concentration meter of the storage tank 211 may be included. These information can be recorded in the recording unit 172.

The recording unit 172 can record data as shown in the recording unit 182 of FIG. 18. That is, the attenuation velocity data measured by the measuring unit 181, the flow rate of the ballast water and the sodium hypochlorite concentration, and the sodium hypochlorite concentration of the storage tank, the elapsed time from the start of the injection of the ballast water, and the navigation Data (preferably including time to multiples) may be included. The recording unit 182 can also record the sodium hypochlorite concentration range to be maintained in the ballast tank.

The control unit 173 can be configured as shown in the control unit 183 in FIG. 18. That is, an analysis unit 1811 for predicting the sodium hypochlorite concentration in the ballast tank 103 at the completion of the ballast water injection, the predetermined time elapse, or the ballast water discharge from the data recorded in the recording unit 182, and the analysis. The supply amount control part 1812 which determines the increase and decrease of the supply amount of the sodium hypochlorite from the chemical liquid supply apparatus 101 based on the result of the part 1811, and controls the amount of sodium hypochlorite supplied to the ballast water supply line 107. May be included.

An example of the ballast water control method and the ballast water pouring method according to the present invention will be described with reference to FIG. As shown in FIG. 19, the ballast pump 106 is first started (S501). As a result, the liquid enters through the sea chest 104. In addition, when the chemical | medical solution supply apparatus 101 is an apparatus using electrolysis, generation | occurrence | production of sodium hypochlorite is started (S502). The liquid withdrawn to the ballast water supply line 107 is transferred by the start-up S501 of the ballast pump 106, and water injection starts to the ballast tank 103 (S503). The flow rate of the ballast water, the start time of water injection, the amount of accumulated water, the hypochlorous acid concentration, and the like are measured by the flow meter FM and the concentration meter C arranged in the ballast water supply line 107. These information can be stored in the recording unit 182. When the feed water to the ballast water supply line 107 starts, the aqueous solution of sodium hypochlorite of the initial set amount is supplied from the chemical liquid supply device 101 to the ballast water supply line 107 through the line 109 (S504). The initial set amount is the concentration range of sodium hypochlorite in the ballast water in the ballast tank 103 after the water injection, the concentration of the aqueous sodium hypochlorite solution stored in the chemical liquid supply device 101 (or the storage tank 211), and Based on the attenuation data of sodium hypochlorite obtained beforehand, etc., it can set previously. The initial setting amount can be stored in the recording unit 182, and the supply amount control unit 1812 of the control unit 183 may control the supply amount based on this information. In addition, it is preferable to set an initial set amount so that it may become below the predetermined density | concentration which can be discharged when a ship arrives at the destination and discharges ballast water (time tx of FIG. 20), It is preferable at the point of drainage cost or drainage time. .

Next, the ballast water supplied with sodium hypochlorite is sampled from the line 111, and the attenuation measurement unit 112 repeats the measurement of the concentration of sodium hypochlorite to obtain attenuation data (S505). Sampling can be performed within 0 to 1 hour after starting ballast water, for example, and the concentration measurement of sodium hypochlorite in the attenuation measurement unit 112 is performed every 30 minutes to 1 hour, for example, 1 to 10 times. It can be measured in the range. The attenuation data in the withdrawn liquid thus obtained is stored in the recording unit 182. In addition, the ballast water number of weeks can continue without stopping even during the measurement of the attenuation data in the attenuation measurement unit 112. The analyzing unit 1811 of the control unit 183 accesses the recording unit 182, and determines whether the amount of sodium hypochlorite currently supplied is appropriate (S506). In addition, the analysis unit 1811 may access the occasional recording unit 182 and determine the point of time when the attenuation curve of the withdrawn liquid is predicted. If the sodium hypochlorite concentration is too high, it may cause damage and deterioration of the pipe (line) or ballast tank, and a reducing agent or standing time is required at the time of discharge. On the other hand, if the sodium hypochlorite concentration is too low, the sterilization treatment of the aquatic microorganisms becomes insufficient. When it is determined that correction of the supply amount of sodium hypochlorite is necessary, the supply amount control unit 1812 of the control unit 183 corrects the amount supplied from the chemical liquid supply device 101 (or the storage tank 211) (S507). On the other hand, when correction of the supply amount of sodium hypochlorite is not necessary, pour of ballast water is continued as it is (S508). The sampling and attenuation data may be generated once or multiple times. In addition, the determination (S506) of the necessity of correction of the sodium hypochlorite supply amount based on the attenuation data may be once or multiple times. These can be judged according to the time taken for the number of weeks of ballast water, or the total amount of ballast water poured in (S509). Finally, the ballast water is pumped to the target capacity (S510), and the ballast water is completed.

(Embodiment 2-3)

It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 2-3 of this invention. In FIG. 22, the same code | symbol is attached | subjected to the same component as FIG.

In the embodiment 2-3, the chemical liquid supply device 801 is connected to a second intake port 804 which is different from the intake port 104 to which the ballast water supply line 107 is connected. That is, the chemical liquid supply apparatus 801 of the present embodiment 2-3 connects the line 810 without connecting the line with which the liquid withdrawn from the water intake port (C chest) 104 which takes in the ballast water can be introduced. It is the same structure as the ballast water treatment system of Embodiment 2-1 except connecting with the 2nd water intake port 804 through. Thus, according to the ballast water treatment system in this embodiment 2-3, the liquid (sodium hypochlorite) withdrawn from the intake port (sea chest) 104 which takes in ballast water in the chemical | medical solution supply apparatus 801. Sodium hypochlorite is generated using the liquid withdrawn from the second intake port 804, rather than the liquid withdrawn before the aqueous solution is added, and thus, for example, it is low power compared to the intake port 104 that takes in ballast water. In addition, the liquid can be easily withdrawn. For this reason, by taking the liquid for generating sodium hypochlorite from the outside during navigation, the sodium hypochlorite can be generated in the chemical liquid supply device 801 during the navigation, for example, the ballast water 103 The power consumption at the time of storage can be reduced. In addition, supply of the sodium hypochlorite aqueous solution in the navigation to the ballast tank 103 becomes easy, and it is possible to suppress the regrowth of aquatic microorganisms in the ballast tank 103. The line 810 may be provided with the pump 806 for conveying the liquid introduce | transduced from the 2nd water intake port 804 to the chemical | medical solution supply apparatus 801, for example. In addition, the line 810 may be provided with the strainer 805 for protecting the chemical | medical agent supply apparatus 801. FIG.

[Third aspect]

In the third aspect of the present invention, there is provided a ballast water supply line for connecting a water intake port and a ballast tank, and an aqueous sodium hypochlorite solution for sterilizing aquatic microorganisms in the liquid collected from the water intake port. And a chemical liquid supply device for supplying the line to the line, wherein the chemical liquid supply device is connected to a second intake port different from the intake port to which the ballast water supply line is connected, and electrolyzes the liquid withdrawn from the second intake port. It relates to a ballast water treatment system (hereinafter also referred to as "third ballast water treatment system of the present invention") to generate sodium hypochlorite.

According to the third ballast water treatment system of the present invention, sodium hypochlorite can be generated easily and at low power by taking in the chemical liquid supply device from a water intake port different from a water intake port (C chest) that ingests the ballast water. Based on the knowledge that there is. In the third ballast water treatment system according to the present invention, since the vessel has intake and discharge of ballast water and loading and unloading of cargo during port berthing, and uses the most electric power, It is based on the knowledge that the peak of power consumption can be disperse | distributed and the capacity | capacitance of the generator mounted in a ship can be made small by introduce | transducing the liquid used for generation | occurrence | production of sodium chlorate, and generation | occurrence | production of sodium hypochlorite.

According to the third ballast water treatment system of the present invention, since the chemical liquid supply device is connected to a second intake port different from the intake port to which the ballast water supply line is connected, for example, a liquid used for generation of sodium hypochlorite is used. It is easy to take water in. Therefore, according to the third ballast water treatment system of the present invention, since the water can be taken out without driving the sea chest, for example, the liquid used for the generation of sodium hypochlorite can be easily taken out even during navigation. It has the effect that the withdrawal can be performed at low power.

In the third aspect, the "second intake port different from the intake port to which the ballast water supply line is connected" is other than an intake port (for example, a sea chest) for taking in liquid for storing in the ballast tank. For example, an intake port for drinking water existing in a ship, etc. are mentioned.

The third ballast water treatment system of the present invention may include a control unit for controlling the amount of sodium hypochlorite supplied from the chemical liquid supply device to the ballast water supply line. The control unit in the third aspect controls the intake of liquid from the second intake port and the generation of sodium hypochlorite based on the amount of sodium hypochlorite in the chemical liquid supply device and or the concentration of sodium hypochlorite in the ballast tank. desirable.

The present invention further provides a ballast water supply line for connecting a water intake port and a ballast tank, and an aqueous sodium hypochlorite solution for sterilizing aquatic microorganisms in a liquid withdrawn from the water intake port. In a ship provided with a chemical liquid supplying device for supplying water to a vessel, a method of treating ballast water, wherein in the chemical liquid supplying device, a liquid withdrawn from a second intake port different from the intake port to which the ballast water supply line is connected is used. Decomposing to generate sodium hypochlorite, and supplying the sodium hypochlorite from the chemical liquid supply device to the ballast water supply line.

It is preferable to perform the electrolysis process in a chemical | medical solution supply apparatus during navigation. Thereby, the power consumption at the time of pouring ballast water to a ballast tank can be reduced. In addition, since sodium hypochlorite is generated and stored during navigation, sodium hypochlorite can be supplied from the start of ballast water injection, thereby preventing the loss of time.

The present invention further provides a ballast water supply line for connecting a water intake port and a ballast tank, and an aqueous sodium hypochlorite solution for sterilizing aquatic microorganisms in a liquid withdrawn from the water intake port. A ship having a chemical liquid supply device for supplying water to a vessel, the method for producing sodium hypochlorite for sterilizing aquatic microorganisms in ballast water, wherein the chemical liquid supply device is connected to an intake port to which the ballast water supply line is connected. It relates to a manufacturing method comprising electrolyzing a liquid withdrawn from a different second intake port to generate sodium hypochlorite. According to the production method of the present invention, for example, since the chemical liquid supply device can easily take out the liquid used for the generation of sodium hypochlorite from the second intake port different from the intake port to which the ballast water supply line is connected, hypochlorous acid It has the effect of easily generating sodium.

It is preferable to perform electrolysis of the said liquid during navigation. Thereby, the power consumption at the time of ballast water injection can be reduced.

(Embodiment 3-1)

It is a schematic block diagram which shows the structure of the ballast water treatment system in Embodiment 3-1 of this invention. In FIG. 23, the same code | symbol is attached | subjected to the same component as FIG.

The ballast water treatment system according to the present embodiment 3-1 is provided with a damping measurement unit 112 and a line 111 for sampling the attenuation measurement unit 112 from the ballast water supply line 107. It is the same structure as the ballast water treatment system of Embodiment 2-3.

An example of the ballast water treatment method using the ballast water treatment system according to the third embodiment of the present invention will be described.

During navigation, before the ballast water intake and / or in the ballast water intake, a liquid used for generation of sodium hypochlorite from the outboard is introduced from the second intake port 804 through the line 810, and sodium hypochlorite by electrolysis. Generates. According to the ballast water treatment system of this embodiment 3-1, the line 810 for introducing the liquid used for the generation of sodium hypochlorite is connected to a second intake port 804 different from the ballast water intake port 104. Therefore, the liquid can be introduced without driving the ballast pump 106. In ships, there are loading and unloading operations of cargo during port berthing, such as when ballast water is stored, and the most electric power is used, so that the peak of power consumption is dispersed and the capacity of the generator is reduced. It is preferable to introduce | transduce the liquid used for generation | occurrence | production of sodium hypochlorite, to generate | occur | produce sodium hypochlorite, and to store it.

In order to take in the ballast water, the ballast pump 106 is started. As a result, the introduction of the liquid is started through the sea chest 104, and water is started in the ballast tank 103 through the ballast water supply line 107. When the feed water to the ballast water supply line 107 starts, the sodium hypochlorite aqueous solution stored in the chemical liquid supply device 801 is supplied to the ballast water supply line 107 via the line 109. According to the ballast water treatment system of the present embodiment 3-1, it is possible to store the sodium hypochlorite generated before the ballast water intake, so that the aqueous solution of sodium hypochlorite with the start of water injection to the ballast tank 103 Can be supplied to the ballast water supply line 107.

The supply amount of the sodium hypochlorite aqueous solution can be determined in advance based on the amount of ballast water injected into the ballast tank 103, the concentration of the aqueous sodium hypochlorite solution stored in the chemical liquid supply device 801 (or the storage tank 211), and the like. . Moreover, you may control the supply amount of the sodium hypochlorite aqueous solution in a control part (not shown) based on the measured value of the flowmeter FM and the sodium hypochlorite concentration meter C arrange | positioned at the ballast water supply line 107. FIG.

Fourth aspect

According to a fourth aspect of the present invention, there is provided a ballast water supply line for connecting a water intake port and a ballast tank, a killing apparatus for killing aquatic organisms in liquids disposed in the line and withdrawn from the water intake port; And a chemical liquid supply device for supplying an aqueous sodium hypochlorite solution to the line for killing aquatic organisms in the liquid withdrawn from the intake port, wherein the killing device includes an electrolytic treatment device and a centrifugal solid solution. A ballast water treatment system selected from the group consisting of a separation device and a device for generating shock waves by treatment with water pressure. According to the ballast water treatment system of a 4th aspect, since the killing process by the said killing apparatus and the killing process by sodium hypochlorite can be processed efficiently with ballast water. In the ballast water treatment system of the fourth aspect, the chemical liquid supply apparatus, the electrolytic treatment apparatus, the ballast water supply line, and the like are the same as those in the first to third aspects.

In the ballast water treatment system of the fourth aspect, the chemical liquid supply device is preferably connected to a ballast pump. Thereby, the liquid for manufacturing the sodium hypochlorite aqueous solution can be performed simultaneously with the withdrawal of ballast water, and processing efficiency can be improved.

(Embodiment 4-1)

24 is a schematic block diagram showing the configuration of a ballast water treatment system according to the embodiment 4-1 of the present invention. In FIG. 24, the same code | symbol is attached | subjected to the same component as FIG.

The ballast water treatment system of this embodiment 4-1 is implemented except that the chemical liquid supply device 101 is connected to the ballast pump 106 via the line 110, and the killing device is the electrolytic treatment device 202. It is the same structure as the ballast water treatment system of the form 1-1. The chemical liquid supply line 109 may be provided with a degassing tank (not shown) for removing the gas contained in the sodium hypochlorite aqueous solution in order to suppress the introduction of excess air into the ballast tank 103. .

An example of the ballast water treatment method using the ballast water treatment system according to the fourth embodiment will be described.

During berthing, the ballast pump 106 is started to take in the ballast water. As a result, the introduction of the liquid is started through the sea chest 104, and water is started in the ballast tank 103 through the ballast water supply line 107. At this time, the liquid used for generation of sodium hypochlorite is introduced into the chemical liquid supply device 101 through the line 110 with the intake of ballast water, and the generation of sodium hypochlorite is performed by electrolysis. According to the ballast water treatment system of this embodiment 4-1, since the line 110 into which the liquid used for the generation of sodium hypochlorite is introduced is connected to the ballast pump 106, the liquid used for the generation of sodium hypochlorite is used. This can be done at the time of water intake of the ballast water. The liquid used for generation of sodium hypochlorite can be withdrawn without driving pumps other than the ballast pump 106.

Subsequently, the liquid introduced through the sea chest 104 is subjected to the killing treatment in the electrolytic treatment device 2020. The killed liquid is supplied to the ballast tank 103 through the ballast water supply line 107 after the aqueous sodium hypochlorite solution generated in the chemical liquid supply device 101 is supplied through the chemical liquid supply line 109. In this manner, by performing the killing treatment by the electrolytic treatment and the killing treatment by sodium hypochlorite, the ballast water can be efficiently treated to a level satisfying the ballast water discharge standard. In addition, since the ballast water stored in the ballast tank 103 contains sodium hypochlorite, the killing effect is maintained during navigation, and the proliferation of aquatic organisms can be suppressed.

Moreover, in Embodiment 4-1, the chemical liquid supply line 109 connects with the ballast water supply line 107 so that the sodium hypochlorite aqueous solution may be supplied to the liquid which carried out the killing process by the electrolytic treatment apparatus 202. For example, the present invention is not limited thereto. For example, the chemical liquid supply line 109 may be connected to the ballast water supply line 107 so that the aqueous sodium hypochlorite solution is supplied before the treatment by the electrolytic treatment apparatus 202, and the treatment by the electrolytic treatment apparatus 202 may be performed. The chemical liquid supply line 109 may be connected to the ballast water supply line 107 so that the sodium hypochlorite aqueous solution is supplied both before and after.

Industrial availability

The present invention is useful in the treatment of ballast water in a ship.

In addition, the present invention relates to any one of the followings.

Ballast water treatment comprising a ballast water supply line for supplying a liquid taken from a water intake to a ballast tank, and a chemical liquid supply device for supplying an aqueous solution of sodium hypochlorite to sterilize aquatic microorganisms in the liquid. In the system,

Sampling the liquid in the line supplied with a predetermined amount of sodium hypochlorite from the chemical liquid supplying device, measuring the attenuation of sodium hypochlorite concentration in the sampled sample, and measuring the attenuation of the sodium hypochlorite concentration from the chemical liquid supplying device based on the measured data. A method of controlling ballast water, comprising adjusting a supply amount of sodium hypochlorite to be supplied to the line;

&Lt; 2 > Sodium hypochlorite in the ballast tank at the time of completion of the ballast water pour, a predetermined time elapse, or at the time of discharge of the ballast water, based on the measurement data of attenuation of sodium hypochlorite in the withdrawn liquid. Predicting the concentration, determining the increase or decrease of the supply amount of sodium hypochlorite supplied from the chemical liquid supply device to the ballast water supply line, and the hypochlorous acid supplied to the line based on the determination A method for controlling the ballast water according to <1>, including controlling the amount of sodium;

<3> The method of controlling the ballast water according to <1> or <2>, wherein the sampling and attenuation measurement are performed in a damping measurement unit having a concentration meter of sodium hypochlorite;

<4> Water pouring method of ballast water containing control by the control method in any one of <1>-<3>;

<5> a ballast water supply line connecting the intake port and the ballast tank,

A chemical liquid supply device connected to the line and supplying an aqueous sodium hypochlorite solution to the line for sterilizing aquatic microorganisms in the liquid withdrawn from the intake port;

An attenuation measurement unit disposed between the connection point of the line and the chemical liquid supply device, a ballast tank, and sampling the liquid in the line to measure sodium hypochlorite concentration;

A recording unit for recording the data measured by the attenuation measuring unit,

A control unit for controlling the amount of sodium hypochlorite supplied from the chemical liquid supply device to the line through the connection point in the ballast water feed water,

Based on the decay rate data of sodium hypochlorite, the control unit predicts the sodium hypochlorite concentration in the ballast tank at the completion of the ballast water doubling, a predetermined time elapse, or at the discharge of the ballast water, and the hypothesis from the chemical liquid supply device. A ballast water treatment system comprising determining the increase and decrease of the supply amount of sodium chlorate and controlling the amount of sodium hypochlorite supplied to said line;

The control unit may further include at least one of the accumulated main water supply amount of the ballast water, the accumulated supply amount of sodium hypochlorite, the navigation data, and the predetermined sodium hypochlorite concentration to be maintained in the ballast tank. A ballast water treatment system according to < 5 >, which performs the prediction and / or the determination based on the above;

<7> The chemical liquid supply device is connected to a second intake port different from the intake port to which the ballast water supply line is connected, and generates sodium hypochlorite using the liquid withdrawn from the second intake port. > Or ballast water treatment system as described in <6>;

<8> A ship provided with the ballast water treatment system in any one of <5>-<7>.

Claims (15)

A ballast water supply line connecting the intake port and the ballast tank,
A killing device disposed in the line for electrically or mechanically killing aquatic organisms in the liquid withdrawn from the inlet;
A chemical liquid supply device connected to the line for supplying an aqueous sodium hypochlorite solution to the line for killing aquatic organisms in the liquid withdrawn from the intake port,
The chemical liquid supply device is connected to a second intake port different from the intake port connected to the ballast water supply line, and electrolytically decomposes the liquid withdrawn from the second intake port to generate sodium hypochlorite. . The method according to claim 1,
The said killing apparatus is an electrolytic treatment apparatus or a centrifugal solid-liquid separator, The ballast water treatment system. The method according to claim 2,
The electrolytic treatment apparatus is a ballast water treatment system having a fixed bottom electrode electrolyzer. The method according to claim 2 or 3,
The electrolytic treatment device is a ballast system, a cross flow method or a dead end method. The method according to any one of claims 1 to 4,
The ballast water treatment system, wherein the chemical liquid supply device is connected between a water intake port to which the line is connected and the killing apparatus, or between the killing apparatus and the ballast tank in the ballast water supply line. The method according to any one of claims 1 to 5,
And a post-treatment device for decomposing the sodium hypochlorite in the ballast water upon discharge of the ballast water. The method according to any one of claims 1 to 6,
The ballast water treatment system further equipped with the acidic liquid storage tank for controlling pH of the liquid which supplies the sodium hypochlorite aqueous solution to pKa or less of hypochlorous acid. Electrical or mechanical killing of aquatic organisms in liquids withdrawn from intakes,
Supplying an aqueous sodium hypochlorite solution to the liquid withdrawn from the intake port, and
Storing the liquid subjected to the killing treatment and the aqueous sodium hypochlorite solution in a ballast tank,
In addition, ballast water treatment method comprising the step of electrolyzing a liquid for the production of sodium hypochlorite containing at least a liquid withdrawn from a second intake port different from the intake port, the aqueous sodium hypochlorite solution. The method according to claim 8,
A method for treating ballast water, wherein the aqueous sodium hypochlorite solution is supplied before or after the electrical or mechanical killing treatment. The method according to claim 8 or 9,
The ballast water treatment method of manufacturing the said sodium hypochlorite aqueous solution is performed during navigation. A ballast water supply line connecting the intake port and the ballast tank,
A chemical liquid supply device connected to the line for supplying an aqueous sodium hypochlorite solution to the line for sterilizing aquatic microorganisms in the liquid withdrawn from the intake port,
The chemical liquid supply device is connected to a second intake port different from the intake port connected to the ballast water supply line, and electrolytically decomposes the liquid withdrawn from the second intake port to generate sodium hypochlorite. . The method of claim 11,
And a control unit for controlling the amount of sodium hypochlorite supplied from the chemical liquid supply device to the line, wherein the control unit is based on the amount of sodium hypochlorite in the chemical liquid supply device and or the sodium hypochlorite concentration in the ballast tank. A ballast water treatment system comprising controlling the intake of liquid from the second intake and the generation of sodium hypochlorite. A ballast water supply line connecting the intake port and the ballast tank,
A vessel comprising a chemical liquid supplying device for supplying an aqueous solution of sodium hypochlorite for sterilizing aquatic microorganisms in a liquid withdrawn from the intake port to the line by connecting to the line, wherein the ballast water is treated.
In the chemical liquid supply apparatus, electrolytically decomposing a liquid withdrawn from a second intake port different from the intake port connected to the ballast water supply line to generate sodium hypochlorite, and
And supplying the sodium hypochlorite from the chemical liquid supplying device to the ballast water supply line. The method according to claim 13,
The ballast water treatment method which performs the electrolysis process in the said chemical liquid supply apparatus in flight. A ship having a ballast water supply line connecting the intake port and the ballast tank, and a chemical liquid supply device connected to the line and supplying an aqueous sodium hypochlorite solution for sterilizing the aquatic microorganisms in the liquid withdrawn from the intake port. A method for producing sodium hypochlorite for sterilizing aquatic microorganisms in ballast water,
The manufacturing method of the chemical liquid supply device comprising producing electrolytically by dissolving a liquid taken out of a second intake port different from the intake port connected to the ballast water supply line to generate sodium hypochlorite.

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